Get PsiFiles in the plugin Follow

Hello Oleg,

How to get in the language plugin all PsiFiles or certain file by name
from the project?

Please see http://confluence.jetbrains.net/display/IDEADEV/IntelliJIDEAArchitectural+Overview
for more information. Note that in most cases you don't ever need to get
all PsiFiles (that would be unusably slow in a real-life-sized project in
any language).

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Dmitry Jemerov
Development Lead
JetBrains, Inc.
http://www.jetbrains.com/
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